Clam-shell grab-bucket.



A. N. DOUD.

GLAM SHELL GRAB BUCKET.

APPLICATION FILED JUNE 1, 1911.

1,007,023. Patented 0612 1911.

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gywweli COLUMBIA PLANOGRAPII c0.,w.\s|uNn'r0N. 11.6.

A. N. DOUD.

OLAM SHELL GRAB BUCKET.

APPLICATION FILED JUNE 1, 1911.

1307 023, 4 Patented 0ct.24, 1911.

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COLUMBIA PLANOGRAPH co.,wAsHlNaToN u c ARTHUR N. DOUD, OF CLEVELAND,OHIO.

CLAM-SHELI| GRAB-BUCKET.

Specification of Letters Patent.

Patented Oct. 24;, 1911.

Application filed June 1, 1911. Serial No. 630,698.

To all whom it may concern:

Be it known that I, ARTHUR N. Dom), a citizen of the United States,residing at Cleveland, in the county of Guyahoga, State of Ohio, haveinvented certain new and useful Improvements in Clam-Shell Grab-Buckets, of which the following is a clescription, reference being hadto the accompanying drawing and to the letters and figures of referencemarked thereon.

The invention relates to new and useful improvements in lifting buckets,and more especially to buckets of the clam shell type wherein thesections of the bucket which are pivoted together, are normally openedor spread when the bucket descends, and said sections are-broughttogether in order to load the material into the bucket.

An object of the invention is to provide means whereby the outer edgesof the bucket sections may be forced down positively by the lifting orclosing rope.

In the drawings which show by way of illustration one embodiment of theinvention; Figure 1 is a side elevation showing a bucket having myimprovements applied thereto, with the bucket sections open; Fig. 2 isan end view of the same; Fig. 3 is a view similar to Fig. 1, showing thesections of the bucket closed; Fig. 1 is a detail of the centralconnecting bracket for the bucket sections.

My improved bucket consists of two sections 1 and 2, which are eachshaped like the ordinary clam shell grab bucket sections. At the loweror inner edges of the bucket sections, are formed the usual cuttingmembers 3. Each bucket section is formed with outwardly projecting arms4, which are pivotally connected by a shaft 5. Mounted on the shaft 5,is a cylindrical weight 6, which is formed at its outer ends withprojecting arms 7. Said projecting arms 7 are connected by a shaft 8 onwhich are mounted, as herein shown, three sheaves 9, 10 and 11. Locatedbetween each of the sheave blocks and on the outer sides thereof, areplates 12. These plates 12 carry guide rollers 13, which aid in guidingthe rope properly on the sheave blocks over which it runs.

A pair of bail-arms 14 are pivoted at their upper ends to the head shaftor other suitable support 15, and at their lower ends at 16 to the outeredges of the bucket section 1. A pair of bail-arms 17 are also pivotedat 15 to the supporting frame, and at their shaft 20 connect-s thebrackets 19 and on said short shaft is mounted a sheave 21. Guidingplates 22 are mounted at their upper ends on the supporting frame, andare also mounted intermediate their ends on the shaft 20. Pivotedbet-ween the guiding plates 22 is a guide roll 23, which-aids in holdingthe rope on the sheave. 21. On the bail-arms 17 is a pair of brackets 21, in which brackets is mounted a shaft 25 carrying a sheave block 26.Guiding plates 27 similar to the plates 22, are mounted on the supporting frame and the shaft 25 and carry a guiding roll 28. A lifting ring29 is attached to the head shaft, and serves as a means for lifting andlowering the bucket. A rope is attached at one end of the head shaft,and this rope 30 passes over the sheaves in the following order; sheave9, sheave 21, sheave 10, sheave 26, sheave 11, and thence between aguiding roller 31 and the supporting frame for the bucket.

In order to limit the opening movement of the sections of the bucket, Ihave provided limiting chains 32 which are connected to the brackets 33mounted at the ends of the shaft 8, and at their upper ends said chainsare connected to the brackets 19 and 24:.

In the operation of my device, the weighted member on the shaft 5 willcarry down the center connection between the bucket sections when theclosing rope is released, and this will position the bucket sections asshown in Fig. 1. With the parts in this position, the bucket is loweredinto contact with the material which is to be lifted and the sharpcutting edges 3, 3, of the bucket will enter the material. A pull on thelifting or closing rope will lift the center connecting portion of thebucket sections and draw the bucket sections to the position shown inFig. 3. The pull of the rope in closing the bucket will exert a force onthe bail-arms 1% and 17, which will tend to crowd the cutting parts 3,3, of the bucket sections into the material. This is accomplished byreason of the fact that the sheave members over which the closing roperuns are mounted on brackets directly carried by the bail-arms, and thelifting of the center section of the bucket will tend to draw the sheave21 toward the sheave 26, and vice versa, which of course tends to crowdthe lower ends of the bail-arms lt and 17 toward each other, andtherefore, as soon as the pivotal center between the sections is above aline joining the pivotal centers 16 and 18, this force operates to closethe bucket.

It is obvious that minor changes in the details of construction may bemade, without departing from the spirit of my invention as set forth inthe appended claims.

Having thus particularly described my invention, What I claim as new anddesire to secure by Letters Patent, is

1. The combination of a pair of pivotally connected bucket sections,pairs of bailarms pivoted to said sections at the outer edges thereof, ahead shaft to which said bail-arms are pivotally connected at theirupper ends, sheaves carried by the bucket sections adjacent theirpivotal connections, sheaves mounted on each pair of bail-arms, and alifting rope passing over said sheaves for closing the bucket sections.

2. The combination of a pair of pivotally connected bucket sections,pairs of bail-arms pivoted to said sections at the outer edges thereof,a head shaft to which said bailarms are pivotally connected at theirupper ends, a weighted member located adjacent the pivotal connection ofthe bucket section, brackets carried by said weighted member, sheavesmounted on the shaft supported by said brackets, pairs of bracketscarried by the bail-arms adjacent their upper ends, a

sheave carried by each pair of brackets, and a rope passing over saidsheaves for closing the bucket sections.

8. The combination of a pair of bucket sections, brackets connected toeach bucket section and projecting laterally therefrom, means forpivotally connecting said brackets, pairs of bail-arms pivoted to saidsections at the outer edges thereof, a head shaft to which saidbail-arms are pivotally connected at their upper ends, sheaves carriedby the bucket sections adjacent their pivotal connections, sheavesmounted on each pair of bail-arms, and a lifting rope passing over saidsheaves for closing the bucket sections;

4. The combination of a pair of pivotally connected bucket sections,pairs of bail-arms pivoted to said sections at the outer edges thereof,a head shaft to which said bailarms are pivotally connected at theirupper ends, brackets mounted on the outer faces of the bail-arms, ashaft connecting each pair of brackets, a sheave mounted on each shaft,sheaves carried by the bucket sections adjacent their pivotalconnections, and a lifting rope passing over the sheaves for closing thebucket sections.

In testimony whereof I afliX my signature, in presence of two witnesses.

ARTHUR N. DOUD.

lVitnesses HARRY W. FISHER, C. H. Fonon.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

